Distribution: Has been reported from the Andaman and Nicobar Islands but no voucher specimens exist according to DAS 1999. The subspecies insularis and septentrionalis have been raised to full species status by GIANNASI et al. (2001) based on RFLPs. I [P.U.] don’t believe that sequence polymorphisms are reliable markers for (sub-) species boundaries but at least in this case follow the trend of elevating whatever subspecies is out there (don’t ask me why - it’s late and I am too tired to make a better decision).

Pauwels, O.S.G.; David, P.; Chimsunchart, C. & Thirakhupt, K. 2003. Reptiles of Phetchaburi Province, Western Thailand: a list of species, with natural history notes, and a discussion on the biogeography at the Isthmus of Kra. Natural History Journal of Chulalongkorn University 3 (1): 23-53 - get paper here

Suyanto, R.L.A.A.H. 1996. Geographical Variation in the Morphology of Four Snake Species from the Lesser Sunda Islands, Eastern Indonesia. Biological Journal of the Linnean Society 59(4):439-456. - get paper here

TEYNIÉ, ALEXANDRE; PATRICK DAVID, & ANNEMARIE OHLER 2010. Note on a collection of Amphibians and Reptiles from Western Sumatra (Indonesia), with the description of a new species of the genus Bufo. Zootaxa 2416: 1–43 - get paper here

Vijayakumar, S. P. and Patrick David 2006. Taxonomy, Natural History, and Distribution of the Snakes of the Nicobar Islands (INDIA), based on new materials and with an Emphasis on endemic species. Russ. J. Herpetol. 13 (1): 11 – 40